This is a vocab game that I have used with every class I've had: adults and kids and it is really effective. I generally use it to revise recently taught or new words. List all new words and cut them into cards or strips and stick them to the board. Students are split into two teams and as I read out the definition of a word, both students run to the board and the first one to find the correct word grabs it and takes it back to their team. Then the next two students repeat the activity followed by the next... etc etc The team with the most words at the end of the game wins. I have found this great for even the quietest classes as everybody gets involved, and the sight of normally timid Japanese and South Korean students wrestling each other to the ground in order to get the word is definitely satisfying!!!